/*
 * engine.h is initialy a file frome miniDart project
 * Author : Eric Bachard  / lundi 3 octobre 2016, 14:35:03 (UTC+0200)
 * This file is under GPL v2 license
 * See : http://www.gnu.org/licenses/gpl-2.0.html
 */

#ifndef __ENGINE_H
#define __ENGINE_H

#ifndef GL_GLEXT_PROTOTYPES
#define GL_GLEXT_PROTOTYPES
#endif
#ifndef GL3_PROTOTYPES
#define GL3_PROTOTYPES 1
#endif

#include <iostream>
#include <SDL3/SDL.h>

// TODO : implement OpenGL 4.x and more recent glsl versions
#define GLSL_VERSION_130  "#version 130"

class Engine
{
  public:
    Engine();
    ~Engine();

    int init_SDL();
    void sdl_application_abort(const char *);
    void clean_and_close();

    SDL_GLContext getGL_Context(){ return gl_context; }
    void setGL_Context(SDL_GLContext  aContext){ gl_context = aContext; }

    SDL_Window * getWindow(){ return window; }
    void setWindow(SDL_Window * aWindow){ window = aWindow; }

    void getSystemDisplayDPI(int, float*, float*);
    bool setApplicationDisplayDPI(float);
    float getDpi() { return dpi; }
    float getDefaultDpi() { return defaultDpi; }
    SDL_DisplayMode current;
    int getWidth(){ return mWidth; }
    int getHeight(){ return mHeight; } 
    inline void setWidth( int dWidth ){ mWidth = dWidth; }
    inline void setHeight(int dHeight ){ mHeight = dHeight; } 

    inline void setDpi(float new_dpi) { dpi = new_dpi; }

    void set_glsl_version(char *);
    const char * get_glsl_version() { return glsl_version; }

    int displayIndex;
    int DisplayNumber;

    int windowDpiScaledWidth;
    int windowDpiScaledHeight;
    int windowDpiUnscaledWidth;
    int windowDpiUnscaledHeight;

  private:
    const char * glsl_version;
    SDL_GLContext gl_context;
    SDL_Window * window;
    float dpi;
    float defaultDpi;
    int mWidth;
    int mHeight;
};

#endif /* __ENGINE_H */